mirror of
https://github.com/cuberite/TCLAP.git
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367 lines
8.2 KiB
C++
367 lines
8.2 KiB
C++
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/******************************************************************************
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*
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* file: MultiArg.h
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*
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* Copyright (c) 2003, Michael E. Smoot .
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* All rights reverved.
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*
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* See the file COPYING in the top directory of this distribution for
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* more information.
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*
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* THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************/
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#ifndef __MULTIPLE_ARGUMENT_HH__
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#define __MULTIPLE_ARGUMENT_HH__
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#include <string>
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#include <vector>
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#include <sstream>
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#include <tclap/Visitor.h>
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using namespace std;
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namespace TCLAP {
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/**
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* An argument that allows multiple values of type T to be specified. Very
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* similar to a ValueArg, except a vector of values will be returned
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* instead of just one.
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*/
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template<class T>
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class MultiArg : public Arg
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{
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protected:
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/**
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* The list of values parsed from the CmdLine.
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*/
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vector<T> _values;
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/**
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* A list of allowed values.
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* A list of values allowed for this argument. If the value parsed
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* for this arg is not found in this list, then an exception is
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* thrown. If the list is empty, then any value is allowed.
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*/
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vector<T> _allowed;
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/**
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* The description of type T to be used in the usage.
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*/
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string _typeDesc;
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/**
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* Extracts the value from the string.
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* Attempts to parse string as type T, if this fails an exception
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* is thrown.
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* \param val - The string to be read.
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*/
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void _extractValue( const string& val );
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/**
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* Checks to see if parsed value is in allowed list.
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* \param val - value parsed (only used in output).
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*/
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void _checkAllowed( const string& val );
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public:
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/**
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* Constructor.
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* \param flag - The one character flag that identifies this
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* argument on the command line.
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* \param name - A one word name for the argument. Can be
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* used as a long flag on the command line.
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* \param desc - A description of what the argument is for or
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* does.
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* \param req - Whether the argument is required on the command
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* line.
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* \param typeDesc - A short, human readable description of the
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* type that this object expects. This is used in the generation
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* of the USAGE statement. The goal is to be helpful to the end user
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* of the program.
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* \param v - An optional visitor. You probably should not
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* use this unless you have a very good reason.
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*/
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MultiArg( const string& flag,
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const string& name,
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const string& desc,
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bool req,
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const string& typeDesc,
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Visitor* v = NULL);
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/**
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* Constructor.
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* \param flag - The one character flag that identifies this
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* argument on the command line.
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* \param name - A one word name for the argument. Can be
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* used as a long flag on the command line.
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* \param desc - A description of what the argument is for or
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* does.
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* \param req - Whether the argument is required on the command
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* line.
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* \param allowed - A vector of type T that where the values in the
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* vector are the only values allowed for the arg.
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* \param v - An optional visitor. You probably should not
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* use this unless you have a very good reason.
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*/
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MultiArg( const string& flag,
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const string& name,
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const string& desc,
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bool req,
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const vector<T>& allowed,
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Visitor* v = NULL);
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/**
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* Destructor.
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*/
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~MultiArg();
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/**
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* Handles the processing of the argument.
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* This re-implements the Arg version of this method to set the
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* _value of the argument appropriately. It knows the difference
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* between labeled and unlabeled.
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* \param i - Pointer the the current argument in the list.
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* \param args - Mutable list of strings. Passed from main().
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*/
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virtual bool processArg(int* i, vector<string>& args);
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/**
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* Returns a vector of type T containing the values parsed from
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* the command line.
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*/
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const vector<T>& getValue() ;
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/**
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* Returns the a short id string. Used in the usage.
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* \param val - value to be used.
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*/
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virtual string shortID(const string& val="val") const;
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/**
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* Returns the a long id string. Used in the usage.
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* \param val - value to be used.
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*/
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virtual string longID(const string& val="val") const;
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/**
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* Once we've matched the first value, then the arg is no longer
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* required.
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*/
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virtual bool isRequired() const;
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};
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/**
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*
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*/
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template<class T>
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MultiArg<T>::MultiArg(const string& flag,
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const string& name,
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const string& desc,
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bool req,
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const string& typeDesc,
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Visitor* v)
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: Arg( flag, name, desc, req, true, v ),
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_typeDesc( typeDesc )
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{ };
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/**
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*
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*/
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template<class T>
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MultiArg<T>::MultiArg(const string& flag,
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const string& name,
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const string& desc,
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bool req,
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const vector<T>& allowed,
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Visitor* v)
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: Arg( flag, name, desc, req, true, v ),
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_allowed( allowed )
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{
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for ( unsigned int i = 0; i < _allowed.size(); i++ )
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{
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ostringstream os;
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os << _allowed[i];
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string temp( os.str() );
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if ( i > 0 )
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_typeDesc += ",";
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_typeDesc += temp;
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}
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};
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/**
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*
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*/
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template<class T>
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MultiArg<T>::~MultiArg() { };
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/**
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*
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*/
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template<class T>
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const vector<T>& MultiArg<T>::getValue() { return _values; };
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/**
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*
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*/
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template<class T>
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bool MultiArg<T>::processArg(int *i, vector<string>& args)
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{
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if ( _ignoreable && Arg::ignoreRest() )
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return false;
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if ( _hasBlanks( args[*i] ) )
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return false;
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string flag = args[*i];
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string value = "";
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trimFlag( flag, value );
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if ( argMatches( flag ) )
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{
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if ( Arg::_delimiter != ' ' && value == "" )
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throw( ArgException( "Couldn't find delimiter for this argument!",
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toString() ) );
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if ( value == "" )
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{
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(*i)++;
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if ( (unsigned int)*i < args.size() )
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_extractValue( args[*i] );
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else
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throw( ArgException("Missing a value for this argument!",
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toString() ) );
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}
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else
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_extractValue( value );
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_checkWithVisitor();
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return true;
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}
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else
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return false;
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}
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/**
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*
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*/
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template<class T>
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void MultiArg<T>::_extractValue( const string& val )
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{
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T temp;
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istringstream is(val);
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int valuesRead = 0;
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while ( is.good() )
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{
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if ( is.peek() != EOF )
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is >> temp;
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else
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break;
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valuesRead++;
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}
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if ( is.fail() )
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throw( ArgException("Couldn't read argument value from string '" +
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val + "'", toString() ) );
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if ( valuesRead > 1 )
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throw( ArgException("More than one valid value parsed from string '" +
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val + "'", toString() ) );
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_values.push_back(temp);
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_checkAllowed( val );
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}
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/**
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* Specialization to handle strings with spaces in them. This is needed
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* because there is no way to tell operator>> to ignore spaces.
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*/
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template<>
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void MultiArg<string>::_extractValue( const string& val )
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{
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_values.push_back( val );
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_checkAllowed( val );
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}
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/**
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* Checks to see if the value parsed is in the allowed list.
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*/
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template<class T>
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void MultiArg<T>::_checkAllowed( const string& val )
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{
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if ( _allowed.size() > 0 )
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if ( find(_allowed.begin(),_allowed.end(),_values.back())
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== _allowed.end() )
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throw( ArgException( "Couldn't find '" + val +
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"' in allowed list.", toString() ) );
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}
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/**
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*
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*/
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template<class T>
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string MultiArg<T>::shortID(const string& val) const
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{
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string id = Arg::shortID(_typeDesc) + " ... ";
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return id;
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}
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/**
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*
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*/
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template<class T>
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string MultiArg<T>::longID(const string& val) const
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{
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string id = Arg::longID(_typeDesc) + " (accepted multiple times)";
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return id;
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}
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/**
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* Once we've matched the first value, then the arg is no longer
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* required.
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*/
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template<class T>
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bool MultiArg<T>::isRequired() const
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{
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if ( _required )
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{
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if ( _values.size() > 1 )
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return false;
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else
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return true;
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}
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else
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return false;
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}
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}
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#endif
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